Joshua 18:21

Vale of Casis, "incision," so called, as some pretend, on account of the balm, which was extracted by cutting the bark with a stone, or with glass. But this etymology seems too far fetched, and there is no proof that balm was cultivated there in the days of Josue. (Calmet) --- Some of the cities of Benjamin have been here omitted, as two others are mentioned, chap. xxi. 18. (Menochius)